This photo provided by Krista Seiden shows smoke rising from what a federal aviation official says was an Asiana Airlines flight crashing while landing at San Francisco airport on Saturday, July 6, 2013. It was not immediately known whether there were any injuries. less

This photo provided by Krista Seiden shows smoke rising from what a federal aviation official says was an Asiana Airlines flight crashing while landing at San Francisco airport on Saturday, July 6, 2013. It was ... more

This photo provided by Antonette Edwards shows what a federal aviation official says was an Asiana Airlines flight crashing while landing at San Francisco airport on Saturday, July 6, 2013. It was not immediately known whether there were any injuries. less

This photo provided by Antonette Edwards shows what a federal aviation official says was an Asiana Airlines flight crashing while landing at San Francisco airport on Saturday, July 6, 2013. It was not ... more

Photo: Antonette Edwards, Associated Press

This photo provided by Antonette Edwards shows what a federal... Photo-4885015.65936 - StamfordAdvocate

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This combination of photos provided by Dawn Siadatan shows Asiana Airlines flight 214 just moments after crashing at the San Francisco International Airport in San Francisco, Saturday, July 6, 2013. The Asiana Airlines Boeing 777 crashed while landing after a likely 10-hour-plus flight from Seoul, South Korea. The flight originated in Shanghai and stopped in Seoul before the long trek to San Francisco. less

This combination of photos provided by Dawn Siadatan shows Asiana Airlines flight 214 just moments after crashing at the San Francisco International Airport in San Francisco, Saturday, July 6, 2013. The Asiana ... more

In this Saturday, July 6, 2013, photo provided by passenger Benjamin Levy, passengers from Asiana Airlines flight 214, many with their luggage, on the tarmac just moments after the plane crashed at the San Francisco International Airport in San Francisco. The flight crashed upon landing, and two of the 307 passengers aboard were killed. less

In this Saturday, July 6, 2013, photo provided by passenger Benjamin Levy, passengers from Asiana Airlines flight 214, many with their luggage, on the tarmac just moments after the plane crashed at the San ... more

Photo: Benjamin Levy, Associated Press

In this Saturday, July 6, 2013, photo provided by passenger... Photo-4900800.65936 - StamfordAdvocate

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Fire crews pour water and foam on an Asiana Airlines Boeing 777 that crashed while it was attempting to land from Seoul, South Korea at San Francisco International Airport in San Francisco, Calif. on Saturday, July 6, 2013. less

Fire crews pour water and foam on an Asiana Airlines Boeing 777 that crashed while it was attempting to land from Seoul, South Korea at San Francisco International Airport in San Francisco, Calif. on Saturday, ... more

A United Airlines 747 that was waiting to takeoff is towed past the fuselage of an Asiana Airlines Boeing 777 that crashed while it was attempting to land at San Francisco International Airport in San Francisco, Calif. on Saturday, July 6, 2013. less

A United Airlines 747 that was waiting to takeoff is towed past the fuselage of an Asiana Airlines Boeing 777 that crashed while it was attempting to land at San Francisco International Airport in San ... more

Photo: Paul Chinn, The Chronicle

A United Airlines 747 that was waiting to takeoff is towed past the... Photo-4885307.65936 - StamfordAdvocate

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People view the wreckage of an Asiana Airlines Boeing 777 that crashed while it was attempting to land from Seoul, South Korea at San Francisco International Airport in San Francisco, Calif. on Saturday, July 6, 2013. less

People view the wreckage of an Asiana Airlines Boeing 777 that crashed while it was attempting to land from Seoul, South Korea at San Francisco International Airport in San Francisco, Calif. on Saturday, July ... more

Officials from NTSB walk near the one of the landing gear components as they continued investigating the crash Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members earlier detailed the investigation into the crash of Asiana Flight 214 at a press conference at SFO on Sunday, July 7, 2013, in San Francisco, Calif. less

Officials from NTSB walk near the one of the landing gear components as they continued investigating the crash Sunday. San Francisco International Airport, city officials and National Transportation Safety ... more

Photo: Carlos Avila Gonzalez, The Chronicle

Officials from NTSB walk near the one of the landing gear... Photo-4889854.65936 - StamfordAdvocate

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The debris of the tail section of the fuselage of Asiana Airlines Flight 214 is visible on the runway at San Francisco International Airport after it crashed on landing and burned on Saturday, July 6, 2013.

The debris of the tail section of the fuselage of Asiana Airlines Flight 214 is visible on the runway at San Francisco International Airport after it crashed on landing and burned on Saturday, July 6, 2013.

Photo: Carlos Avila Gonzalez, The Chronicle

The debris of the tail section of the fuselage of Asiana Airlines... Photo-4885763.65936 - StamfordAdvocate

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David Eun, Executive Vice President of Samsung Electronics Co. Ltd., was a passenger aboard Asiana Airlines flight 214 that crashed at San Francisco International Airport Saturday, July 7, 2013. He published this photograph and comment to his Path account and subsequently shared it to his Twitter feed. A screenshot shows how his content appeared on Path. less

David Eun, Executive Vice President of Samsung Electronics Co. Ltd., was a passenger aboard Asiana Airlines flight 214 that crashed at San Francisco International Airport Saturday, July 7, 2013. He published ... more

A team of emergency responders walk on the runway past the tail of an Asiana Airlines Boeing 777 that crashed while attempting to land at San Francisco International Airport in San Francisco, Calif. on Saturday, July 6, 2013. less

A team of emergency responders walk on the runway past the tail of an Asiana Airlines Boeing 777 that crashed while attempting to land at San Francisco International Airport in San Francisco, Calif. on ... more

Photo: Paul Chinn, The Chronicle

A team of emergency responders walk on the runway past the tail of... Photo-4885804.65936 - StamfordAdvocate

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Potential victims of the Asiana plane crash cover their faces as they are lead by security out of the Reflection Room in the North Wing of the International Terminal at SFO in San Francisco, CA on July 6th, 2013. less

Potential victims of the Asiana plane crash cover their faces as they are lead by security out of the Reflection Room in the North Wing of the International Terminal at SFO in San Francisco, CA on July 6th, ... more

Abbie Smith and Patrick Bevin, hug in International terminal as they wait for flights at San Francisco airport even as operations have reopened two runways in San Francisco, Calif., on Saturday July 6, 2013. Smith's flight back to New Zealand has been delayed eight hours so far due to the crash. The investigation into the crash of Asiana Airlines flight 214 continues. less

Abbie Smith and Patrick Bevin, hug in International terminal as they wait for flights at San Francisco airport even as operations have reopened two runways in San Francisco, Calif., on Saturday July 6, 2013. ... more

San Francisco Mayor Ed Lee listens as Deborah Hersman, Chairman of the NTSB, speaks about Flight 214's crash at SFO during a press conference on Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members detailed the investigation into the crash of Asiana Flight 214 at a press conference at SFO on Sunday, July 7, 2013, in San Francisco, Calif. less

San Francisco Mayor Ed Lee listens as Deborah Hersman, Chairman of the NTSB, speaks about Flight 214's crash at SFO during a press conference on Sunday. San Francisco International Airport, city officials and ... more

Deborah Hersman, Chairman of the NTSB, spoke about Flight 214's crash at SFO during a press conference on Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members detailed the investigation into the crash of Asiana Flight 214 at a press conference at SFO on Sunday, July 7, 2013, in San Francisco, Calif. less

Deborah Hersman, Chairman of the NTSB, spoke about Flight 214's crash at SFO during a press conference on Sunday. San Francisco International Airport, city officials and National Transportation Safety Board ... more

Scenes from SF general where patients from the Boeing 777 crash are being brought in on Saturday, July 06, 2013 in San Francisco, Calif.

Scenes from SF general where patients from the Boeing 777 crash are being brought in on Saturday, July 06, 2013 in San Francisco, Calif.

Photo: Rohan Smith, The Chronicle

Scenes from SF general where patients from the Boeing 777 crash are... Photo-4889841.65936 - StamfordAdvocate

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SFPD officers stand guard in front of the Reflection Room, where potential victims of the Asiana plane crash and their families are being held in the North Wing of the International Terminal at SFO in San Francisco, CA on July 6th, 2013. less

SFPD officers stand guard in front of the Reflection Room, where potential victims of the Asiana plane crash and their families are being held in the North Wing of the International Terminal at SFO in San ... more

Ge Gam(center), who is a friend of a family of survivors on the Asiana plane crash, speaks with the media outside the Reflection Room in the North Wing of the International Terminal at SFO in San Francisco, CA on July 6th, 2013. less

Ge Gam(center), who is a friend of a family of survivors on the Asiana plane crash, speaks with the media outside the Reflection Room in the North Wing of the International Terminal at SFO in San Francisco, CA ... more

Photo: Michael Short, Special To The Chronicle

Ge Gam(center), who is a friend of a family of survivors on the... Photo-4889830.65936 - StamfordAdvocate

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Scenes from SF general where patients from the Boeing 777 crash are being brought in on Saturday, July 06, 2013 in San Francisco, Calif.

Scenes from SF general where patients from the Boeing 777 crash are being brought in on Saturday, July 06, 2013 in San Francisco, Calif.

Photo: Rohan Smith, The Chronicle

Scenes from SF general where patients from the Boeing 777 crash are... Photo-4885756.65936 - StamfordAdvocate

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A family of passengers from Asiana Airlines Boeing 777 which crashed while it was attempting to land at San Francisco International Airport are escorted out of the Reflection Room in San Francisco International Airport where flight passengers are being held on July 6, 2013. less

A family of passengers from Asiana Airlines Boeing 777 which crashed while it was attempting to land at San Francisco International Airport are escorted out of the Reflection Room in San Francisco International ... more

Photo: Michael Short, Special To The Chronicle

A family of passengers from Asiana Airlines Boeing 777 which... Photo-4886132.65936 - StamfordAdvocate

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A young passenger from the Asiana Airlines Boeing 777 which crashed while it was attempting to land at San Francisco International Airport is escorted out of the Reflection Room in San Francisco International Airport where flight passengers are being held on July 6, 2013. less

A young passenger from the Asiana Airlines Boeing 777 which crashed while it was attempting to land at San Francisco International Airport is escorted out of the Reflection Room in San Francisco International ... more

Photo: Michael Short, Special To The Chronicle

A young passenger from the Asiana Airlines Boeing 777 which crashed... Photo-4885665.65936 - StamfordAdvocate

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Victims of the Asiana plane crash are loaded onto waiting buses at the North Wing of the International Terminal at SFO in San Francisco, CA on July 6th, 2013.

Victims of the Asiana plane crash are loaded onto waiting buses at the North Wing of the International Terminal at SFO in San Francisco, CA on July 6th, 2013.

Potential plane passengers and family members are escorted out of the Reflection Room at San Francisco International Airport where victims are being held after a Boeing 777 crash at San Francisco International Airport in San Francisco, Calif. on July 6, 2013. less

Potential plane passengers and family members are escorted out of the Reflection Room at San Francisco International Airport where victims are being held after a Boeing 777 crash at San Francisco International ... more

Photo: Katie Meek, The Chronicle

Potential plane passengers and family members are escorted out of... Photo-4889843.65936 - StamfordAdvocate

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Emergency personnel assist passengers to transportation at the International terminal in San Francisco, Calif., on Saturday July 6, 2013, following the earlier crash of Asiana Airlines flight 214 at SFO.

Emergency personnel assist passengers to transportation at the International terminal in San Francisco, Calif., on Saturday July 6, 2013, following the earlier crash of Asiana Airlines flight 214 at SFO.

San Francisco Mayor Ed Lee, (center) listens as Fire Chief Joanne Hayes-White releases details during a press conference in San Francisco, Calif., on Saturday July 6, 2013, about the crash of Asiana Airlines flight 214 this morning at San Francisco International airport. less

San Francisco Mayor Ed Lee, (center) listens as Fire Chief Joanne Hayes-White releases details during a press conference in San Francisco, Calif., on Saturday July 6, 2013, about the crash of Asiana Airlines ... more

An Eva Air jetliner comes in for a landing above the Asiana Airlines Boeing 777 that crashed while attempting to land from Seoul, South Korea, at San Francisco International Airport in San Francisco, Calif. on Saturday, July 6, 2013. less

An Eva Air jetliner comes in for a landing above the Asiana Airlines Boeing 777 that crashed while attempting to land from Seoul, South Korea, at San Francisco International Airport in San Francisco, Calif. on ... more

Photo: Paul Chinn, The Chronicle

An Eva Air jetliner comes in for a landing above the Asiana... Photo-4886150.65936 - StamfordAdvocate

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Parents of Wang Linjia, center, are comforted by parents of some other students who were on the Asiana Airlines Flight 214 that crashed at San Francisco International Airport, at Jiangshan Middle School in Jiangshan city, in eastern China's Zhejiang province, Sunday July 7, 2013. Chinese state media have identified the two people who died in the plane crash at San Francisco International Airport on Saturday as Ye Mengyuan and Wang Linjia, students at Jiangshan Middle School in China's eastern Zhejiang province. less

Parents of Wang Linjia, center, are comforted by parents of some other students who were on the Asiana Airlines Flight 214 that crashed at San Francisco International Airport, at Jiangshan Middle School in ... more

Aircraft pasrts that resemble a landing gear rests on the runway after an Asiana Airlines Boeing 777 crashed while it was attempting to land at San Francisco International Airport in San Francisco, Calif. on Saturday, July 6, 2013. less

Aircraft pasrts that resemble a landing gear rests on the runway after an Asiana Airlines Boeing 777 crashed while it was attempting to land at San Francisco International Airport in San Francisco, Calif. on ... more

Wen "Kitty" Zhang, an Asiana flight 214 passenger was seated in row 40 with 5 members of her family including her husband, son, sister, brother-in-law, and niece, during the crash landing at SFO, gives an interview to the media gathered at San Francisco General Hospital in San Francisco, CA on Sunday, July 7th, 2013. less

Wen "Kitty" Zhang, an Asiana flight 214 passenger was seated in row 40 with 5 members of her family including her husband, son, sister, brother-in-law, and niece, during the crash landing at SFO, gives an ... more

Officials from NTSB walk near debris as they continued investigating the crash of Flight 214 on Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members earlier detailed the investigation into the crash of Asiana Flight 214 at a press conference at SFO on Sunday, July 7, 2013, in San Francisco, Calif. less

Officials from NTSB walk near debris as they continued investigating the crash of Flight 214 on Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members ... more

Photo: Carlos Avila Gonzalez, The Chronicle

Officials from NTSB walk near debris as they continued... Photo-4889823.65936 - StamfordAdvocate

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NTSB Aerospace Engineer Greg Smith receives the recorders from the Asiana 777-200 in the NTSB laboratory on the morning of July 7, 2013 in Washington, D.C.

NTSB Aerospace Engineer Greg Smith receives the recorders from the Asiana 777-200 in the NTSB laboratory on the morning of July 7, 2013 in Washington, D.C.

Yang Lin, a passenger of the Asiana Boeing 777 that crash landed at San Francisco International airport, talks with the media at the Chinese Consulate building in San Francisco, Calif. on July 7, 2013.

Yang Lin, a passenger of the Asiana Boeing 777 that crash landed at San Francisco International airport, talks with the media at the Chinese Consulate building in San Francisco, Calif. on July 7, 2013.

Yang Lin, a passenger of the Asiana Boeing 777 that crash landed at San Francisco International airport, poses for a new passport picture after he lost his passport during the crash at the Chinese Consulate building in San Francisco, Calif. on July 7, 2013. less

Yang Lin, a passenger of the Asiana Boeing 777 that crash landed at San Francisco International airport, poses for a new passport picture after he lost his passport during the crash at the Chinese Consulate ... more

An Air China plane taxis for take off on runway 28R near the debris from Flight 214 while officials from NTSB continued investigating the crash Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members earlier detailed the investigation into the crash of Asiana Flight 214 at a press conference at SFO on Sunday, July 7, 2013, in San Francisco, Calif.

An Air China plane taxis for take off on runway 28R near the debris from Flight 214 while officials from NTSB continued investigating the crash Sunday. San Francisco International Airport, city officials and

An Air China plane taxis for take off on runway 28R near the... Photo-4888451.65936 - StamfordAdvocate

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A United Airlines plane takes off near the crashed fuselage of Flight 214 while officials from NTSB continued investigating the crash Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members earlier detailed the investigation into the crash of Asiana Flight 214 at a press conference at SFO on Sunday, July 7, 2013, in San Francisco, Calif. less

A United Airlines plane takes off near the crashed fuselage of Flight 214 while officials from NTSB continued investigating the crash Sunday. San Francisco International Airport, city officials and National ... more

Photo: Carlos Avila Gonzalez, The Chronicle

A United Airlines plane takes off near the crashed fuselage of... Photo-4888304.65936 - StamfordAdvocate

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A United Airlines plane lands near the crashed fuselage of Flight 214 while people watch from Millbrae Avenue and officials from NTSB continued investigating the crash Sunday. San Francisco International Airport, city officials and National Transportation Safety Board members earlier detailed the investigation into the crash of Asiana Flight 214 at a press conference at SFO on Sunday, July 7, 2013, in San Francisco, Calif. less

A United Airlines plane lands near the crashed fuselage of Flight 214 while people watch from Millbrae Avenue and officials from NTSB continued investigating the crash Sunday. San Francisco International ... more

Photo: Carlos Avila Gonzalez, The Chronicle

A United Airlines plane lands near the crashed fuselage of Flight... Photo-4889825.65936 - StamfordAdvocate

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NTSB chairman Deborah Hersman answered a reporters question about early warning alarms Monday July 8, 2013. NTSB Chairman Deborah Hersman talked about the latest findings in their investigation of the airliner crash at SFO. less

NTSB chairman Deborah Hersman answered a reporters question about early warning alarms Monday July 8, 2013. NTSB Chairman Deborah Hersman talked about the latest findings in their investigation of the airliner ... more

Officials from National Transportation Safety Board (NTSB) walk near the debris of the tail section of Asiana Flight 214 as they continued investigating the crash of Flight 214 as an Asiana airplane passes above during landing (top) on Monday, July 8, 2013 at San Francisco International Airport. less

Officials from National Transportation Safety Board (NTSB) walk near the debris of the tail section of Asiana Flight 214 as they continued investigating the crash of Flight 214 as an Asiana airplane passes ... more

Travelers prepare to check in for an Asiana Airlines flight to Korea in the international terminal at San Francisco International Airport on July 8, 2013 in San Francisco, California. Two days after Asiana Airlines flight 214 crash landed at San Francisco International Airport, the National Transportation Safety Board (NTSB) is continuing their investigation as to why the plane crashed. less

Travelers prepare to check in for an Asiana Airlines flight to Korea in the international terminal at San Francisco International Airport on July 8, 2013 in San Francisco, California. Two days after Asiana ... more

Travelers prepare to check in for an Asiana Airlines flight to Korea in the international terminal at San Francisco International Airport on July 8, 2013 in San Francisco, California. Two days after Asiana Airlines flight 214 crash landed at San Francisco International Airport, the National Transportation Safety Board (NTSB) is continuing their investigation as to why the plane crashed. less

Travelers prepare to check in for an Asiana Airlines flight to Korea in the international terminal at San Francisco International Airport on July 8, 2013 in San Francisco, California. Two days after Asiana ... more

Asiana Airlines President and CEO Yoon Young-doo, left, greets unidentified family members of two Chinese students killed in an Asiana Airlines plane crash on Saturday at San Francisco International Airport, at the transit lounge of the Incheon International Airport in Incheon, west of Seoul, South Korea, Monday, July 8, 2013. less

Asiana Airlines President and CEO Yoon Young-doo, left, greets unidentified family members of two Chinese students killed in an Asiana Airlines plane crash on Saturday at San Francisco International Airport, at ... more